Version:  2.0.40 2.2.26 2.4.37 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18

Linux/drivers/mfd/rtsx_pcr.c

  1 /* Driver for Realtek PCI-Express card reader
  2  *
  3  * Copyright(c) 2009-2013 Realtek Semiconductor Corp. All rights reserved.
  4  *
  5  * This program is free software; you can redistribute it and/or modify it
  6  * under the terms of the GNU General Public License as published by the
  7  * Free Software Foundation; either version 2, or (at your option) any
  8  * later version.
  9  *
 10  * This program is distributed in the hope that it will be useful, but
 11  * WITHOUT ANY WARRANTY; without even the implied warranty of
 12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 13  * General Public License for more details.
 14  *
 15  * You should have received a copy of the GNU General Public License along
 16  * with this program; if not, see <http://www.gnu.org/licenses/>.
 17  *
 18  * Author:
 19  *   Wei WANG <wei_wang@realsil.com.cn>
 20  */
 21 
 22 #include <linux/pci.h>
 23 #include <linux/module.h>
 24 #include <linux/slab.h>
 25 #include <linux/dma-mapping.h>
 26 #include <linux/highmem.h>
 27 #include <linux/interrupt.h>
 28 #include <linux/delay.h>
 29 #include <linux/idr.h>
 30 #include <linux/platform_device.h>
 31 #include <linux/mfd/core.h>
 32 #include <linux/mfd/rtsx_pci.h>
 33 #include <asm/unaligned.h>
 34 
 35 #include "rtsx_pcr.h"
 36 
 37 static bool msi_en = true;
 38 module_param(msi_en, bool, S_IRUGO | S_IWUSR);
 39 MODULE_PARM_DESC(msi_en, "Enable MSI");
 40 
 41 static DEFINE_IDR(rtsx_pci_idr);
 42 static DEFINE_SPINLOCK(rtsx_pci_lock);
 43 
 44 static struct mfd_cell rtsx_pcr_cells[] = {
 45         [RTSX_SD_CARD] = {
 46                 .name = DRV_NAME_RTSX_PCI_SDMMC,
 47         },
 48         [RTSX_MS_CARD] = {
 49                 .name = DRV_NAME_RTSX_PCI_MS,
 50         },
 51 };
 52 
 53 static const struct pci_device_id rtsx_pci_ids[] = {
 54         { PCI_DEVICE(0x10EC, 0x5209), PCI_CLASS_OTHERS << 16, 0xFF0000 },
 55         { PCI_DEVICE(0x10EC, 0x5229), PCI_CLASS_OTHERS << 16, 0xFF0000 },
 56         { PCI_DEVICE(0x10EC, 0x5289), PCI_CLASS_OTHERS << 16, 0xFF0000 },
 57         { PCI_DEVICE(0x10EC, 0x5227), PCI_CLASS_OTHERS << 16, 0xFF0000 },
 58         { PCI_DEVICE(0x10EC, 0x5249), PCI_CLASS_OTHERS << 16, 0xFF0000 },
 59         { PCI_DEVICE(0x10EC, 0x5287), PCI_CLASS_OTHERS << 16, 0xFF0000 },
 60         { PCI_DEVICE(0x10EC, 0x5286), PCI_CLASS_OTHERS << 16, 0xFF0000 },
 61         { 0, }
 62 };
 63 
 64 MODULE_DEVICE_TABLE(pci, rtsx_pci_ids);
 65 
 66 void rtsx_pci_start_run(struct rtsx_pcr *pcr)
 67 {
 68         /* If pci device removed, don't queue idle work any more */
 69         if (pcr->remove_pci)
 70                 return;
 71 
 72         if (pcr->state != PDEV_STAT_RUN) {
 73                 pcr->state = PDEV_STAT_RUN;
 74                 if (pcr->ops->enable_auto_blink)
 75                         pcr->ops->enable_auto_blink(pcr);
 76 
 77                 if (pcr->aspm_en)
 78                         rtsx_pci_write_config_byte(pcr, LCTLR, 0);
 79         }
 80 
 81         mod_delayed_work(system_wq, &pcr->idle_work, msecs_to_jiffies(200));
 82 }
 83 EXPORT_SYMBOL_GPL(rtsx_pci_start_run);
 84 
 85 int rtsx_pci_write_register(struct rtsx_pcr *pcr, u16 addr, u8 mask, u8 data)
 86 {
 87         int i;
 88         u32 val = HAIMR_WRITE_START;
 89 
 90         val |= (u32)(addr & 0x3FFF) << 16;
 91         val |= (u32)mask << 8;
 92         val |= (u32)data;
 93 
 94         rtsx_pci_writel(pcr, RTSX_HAIMR, val);
 95 
 96         for (i = 0; i < MAX_RW_REG_CNT; i++) {
 97                 val = rtsx_pci_readl(pcr, RTSX_HAIMR);
 98                 if ((val & HAIMR_TRANS_END) == 0) {
 99                         if (data != (u8)val)
100                                 return -EIO;
101                         return 0;
102                 }
103         }
104 
105         return -ETIMEDOUT;
106 }
107 EXPORT_SYMBOL_GPL(rtsx_pci_write_register);
108 
109 int rtsx_pci_read_register(struct rtsx_pcr *pcr, u16 addr, u8 *data)
110 {
111         u32 val = HAIMR_READ_START;
112         int i;
113 
114         val |= (u32)(addr & 0x3FFF) << 16;
115         rtsx_pci_writel(pcr, RTSX_HAIMR, val);
116 
117         for (i = 0; i < MAX_RW_REG_CNT; i++) {
118                 val = rtsx_pci_readl(pcr, RTSX_HAIMR);
119                 if ((val & HAIMR_TRANS_END) == 0)
120                         break;
121         }
122 
123         if (i >= MAX_RW_REG_CNT)
124                 return -ETIMEDOUT;
125 
126         if (data)
127                 *data = (u8)(val & 0xFF);
128 
129         return 0;
130 }
131 EXPORT_SYMBOL_GPL(rtsx_pci_read_register);
132 
133 int rtsx_pci_write_phy_register(struct rtsx_pcr *pcr, u8 addr, u16 val)
134 {
135         int err, i, finished = 0;
136         u8 tmp;
137 
138         rtsx_pci_init_cmd(pcr);
139 
140         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PHYDATA0, 0xFF, (u8)val);
141         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PHYDATA1, 0xFF, (u8)(val >> 8));
142         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PHYADDR, 0xFF, addr);
143         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PHYRWCTL, 0xFF, 0x81);
144 
145         err = rtsx_pci_send_cmd(pcr, 100);
146         if (err < 0)
147                 return err;
148 
149         for (i = 0; i < 100000; i++) {
150                 err = rtsx_pci_read_register(pcr, PHYRWCTL, &tmp);
151                 if (err < 0)
152                         return err;
153 
154                 if (!(tmp & 0x80)) {
155                         finished = 1;
156                         break;
157                 }
158         }
159 
160         if (!finished)
161                 return -ETIMEDOUT;
162 
163         return 0;
164 }
165 EXPORT_SYMBOL_GPL(rtsx_pci_write_phy_register);
166 
167 int rtsx_pci_read_phy_register(struct rtsx_pcr *pcr, u8 addr, u16 *val)
168 {
169         int err, i, finished = 0;
170         u16 data;
171         u8 *ptr, tmp;
172 
173         rtsx_pci_init_cmd(pcr);
174 
175         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PHYADDR, 0xFF, addr);
176         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PHYRWCTL, 0xFF, 0x80);
177 
178         err = rtsx_pci_send_cmd(pcr, 100);
179         if (err < 0)
180                 return err;
181 
182         for (i = 0; i < 100000; i++) {
183                 err = rtsx_pci_read_register(pcr, PHYRWCTL, &tmp);
184                 if (err < 0)
185                         return err;
186 
187                 if (!(tmp & 0x80)) {
188                         finished = 1;
189                         break;
190                 }
191         }
192 
193         if (!finished)
194                 return -ETIMEDOUT;
195 
196         rtsx_pci_init_cmd(pcr);
197 
198         rtsx_pci_add_cmd(pcr, READ_REG_CMD, PHYDATA0, 0, 0);
199         rtsx_pci_add_cmd(pcr, READ_REG_CMD, PHYDATA1, 0, 0);
200 
201         err = rtsx_pci_send_cmd(pcr, 100);
202         if (err < 0)
203                 return err;
204 
205         ptr = rtsx_pci_get_cmd_data(pcr);
206         data = ((u16)ptr[1] << 8) | ptr[0];
207 
208         if (val)
209                 *val = data;
210 
211         return 0;
212 }
213 EXPORT_SYMBOL_GPL(rtsx_pci_read_phy_register);
214 
215 void rtsx_pci_stop_cmd(struct rtsx_pcr *pcr)
216 {
217         rtsx_pci_writel(pcr, RTSX_HCBCTLR, STOP_CMD);
218         rtsx_pci_writel(pcr, RTSX_HDBCTLR, STOP_DMA);
219 
220         rtsx_pci_write_register(pcr, DMACTL, 0x80, 0x80);
221         rtsx_pci_write_register(pcr, RBCTL, 0x80, 0x80);
222 }
223 EXPORT_SYMBOL_GPL(rtsx_pci_stop_cmd);
224 
225 void rtsx_pci_add_cmd(struct rtsx_pcr *pcr,
226                 u8 cmd_type, u16 reg_addr, u8 mask, u8 data)
227 {
228         unsigned long flags;
229         u32 val = 0;
230         u32 *ptr = (u32 *)(pcr->host_cmds_ptr);
231 
232         val |= (u32)(cmd_type & 0x03) << 30;
233         val |= (u32)(reg_addr & 0x3FFF) << 16;
234         val |= (u32)mask << 8;
235         val |= (u32)data;
236 
237         spin_lock_irqsave(&pcr->lock, flags);
238         ptr += pcr->ci;
239         if (pcr->ci < (HOST_CMDS_BUF_LEN / 4)) {
240                 put_unaligned_le32(val, ptr);
241                 ptr++;
242                 pcr->ci++;
243         }
244         spin_unlock_irqrestore(&pcr->lock, flags);
245 }
246 EXPORT_SYMBOL_GPL(rtsx_pci_add_cmd);
247 
248 void rtsx_pci_send_cmd_no_wait(struct rtsx_pcr *pcr)
249 {
250         u32 val = 1 << 31;
251 
252         rtsx_pci_writel(pcr, RTSX_HCBAR, pcr->host_cmds_addr);
253 
254         val |= (u32)(pcr->ci * 4) & 0x00FFFFFF;
255         /* Hardware Auto Response */
256         val |= 0x40000000;
257         rtsx_pci_writel(pcr, RTSX_HCBCTLR, val);
258 }
259 EXPORT_SYMBOL_GPL(rtsx_pci_send_cmd_no_wait);
260 
261 int rtsx_pci_send_cmd(struct rtsx_pcr *pcr, int timeout)
262 {
263         struct completion trans_done;
264         u32 val = 1 << 31;
265         long timeleft;
266         unsigned long flags;
267         int err = 0;
268 
269         spin_lock_irqsave(&pcr->lock, flags);
270 
271         /* set up data structures for the wakeup system */
272         pcr->done = &trans_done;
273         pcr->trans_result = TRANS_NOT_READY;
274         init_completion(&trans_done);
275 
276         rtsx_pci_writel(pcr, RTSX_HCBAR, pcr->host_cmds_addr);
277 
278         val |= (u32)(pcr->ci * 4) & 0x00FFFFFF;
279         /* Hardware Auto Response */
280         val |= 0x40000000;
281         rtsx_pci_writel(pcr, RTSX_HCBCTLR, val);
282 
283         spin_unlock_irqrestore(&pcr->lock, flags);
284 
285         /* Wait for TRANS_OK_INT */
286         timeleft = wait_for_completion_interruptible_timeout(
287                         &trans_done, msecs_to_jiffies(timeout));
288         if (timeleft <= 0) {
289                 dev_dbg(&(pcr->pci->dev), "Timeout (%s %d)\n",
290                                 __func__, __LINE__);
291                 err = -ETIMEDOUT;
292                 goto finish_send_cmd;
293         }
294 
295         spin_lock_irqsave(&pcr->lock, flags);
296         if (pcr->trans_result == TRANS_RESULT_FAIL)
297                 err = -EINVAL;
298         else if (pcr->trans_result == TRANS_RESULT_OK)
299                 err = 0;
300         else if (pcr->trans_result == TRANS_NO_DEVICE)
301                 err = -ENODEV;
302         spin_unlock_irqrestore(&pcr->lock, flags);
303 
304 finish_send_cmd:
305         spin_lock_irqsave(&pcr->lock, flags);
306         pcr->done = NULL;
307         spin_unlock_irqrestore(&pcr->lock, flags);
308 
309         if ((err < 0) && (err != -ENODEV))
310                 rtsx_pci_stop_cmd(pcr);
311 
312         if (pcr->finish_me)
313                 complete(pcr->finish_me);
314 
315         return err;
316 }
317 EXPORT_SYMBOL_GPL(rtsx_pci_send_cmd);
318 
319 static void rtsx_pci_add_sg_tbl(struct rtsx_pcr *pcr,
320                 dma_addr_t addr, unsigned int len, int end)
321 {
322         u64 *ptr = (u64 *)(pcr->host_sg_tbl_ptr) + pcr->sgi;
323         u64 val;
324         u8 option = SG_VALID | SG_TRANS_DATA;
325 
326         dev_dbg(&(pcr->pci->dev), "DMA addr: 0x%x, Len: 0x%x\n",
327                         (unsigned int)addr, len);
328 
329         if (end)
330                 option |= SG_END;
331         val = ((u64)addr << 32) | ((u64)len << 12) | option;
332 
333         put_unaligned_le64(val, ptr);
334         pcr->sgi++;
335 }
336 
337 int rtsx_pci_transfer_data(struct rtsx_pcr *pcr, struct scatterlist *sglist,
338                 int num_sg, bool read, int timeout)
339 {
340         int err = 0, count;
341 
342         dev_dbg(&(pcr->pci->dev), "--> %s: num_sg = %d\n", __func__, num_sg);
343         count = rtsx_pci_dma_map_sg(pcr, sglist, num_sg, read);
344         if (count < 1)
345                 return -EINVAL;
346         dev_dbg(&(pcr->pci->dev), "DMA mapping count: %d\n", count);
347 
348         err = rtsx_pci_dma_transfer(pcr, sglist, count, read, timeout);
349 
350         rtsx_pci_dma_unmap_sg(pcr, sglist, num_sg, read);
351 
352         return err;
353 }
354 EXPORT_SYMBOL_GPL(rtsx_pci_transfer_data);
355 
356 int rtsx_pci_dma_map_sg(struct rtsx_pcr *pcr, struct scatterlist *sglist,
357                 int num_sg, bool read)
358 {
359         enum dma_data_direction dir = read ? DMA_FROM_DEVICE : DMA_TO_DEVICE;
360 
361         if (pcr->remove_pci)
362                 return -EINVAL;
363 
364         if ((sglist == NULL) || (num_sg <= 0))
365                 return -EINVAL;
366 
367         return dma_map_sg(&(pcr->pci->dev), sglist, num_sg, dir);
368 }
369 EXPORT_SYMBOL_GPL(rtsx_pci_dma_map_sg);
370 
371 void rtsx_pci_dma_unmap_sg(struct rtsx_pcr *pcr, struct scatterlist *sglist,
372                 int num_sg, bool read)
373 {
374         enum dma_data_direction dir = read ? DMA_FROM_DEVICE : DMA_TO_DEVICE;
375 
376         dma_unmap_sg(&(pcr->pci->dev), sglist, num_sg, dir);
377 }
378 EXPORT_SYMBOL_GPL(rtsx_pci_dma_unmap_sg);
379 
380 int rtsx_pci_dma_transfer(struct rtsx_pcr *pcr, struct scatterlist *sglist,
381                 int count, bool read, int timeout)
382 {
383         struct completion trans_done;
384         struct scatterlist *sg;
385         dma_addr_t addr;
386         long timeleft;
387         unsigned long flags;
388         unsigned int len;
389         int i, err = 0;
390         u32 val;
391         u8 dir = read ? DEVICE_TO_HOST : HOST_TO_DEVICE;
392 
393         if (pcr->remove_pci)
394                 return -ENODEV;
395 
396         if ((sglist == NULL) || (count < 1))
397                 return -EINVAL;
398 
399         val = ((u32)(dir & 0x01) << 29) | TRIG_DMA | ADMA_MODE;
400         pcr->sgi = 0;
401         for_each_sg(sglist, sg, count, i) {
402                 addr = sg_dma_address(sg);
403                 len = sg_dma_len(sg);
404                 rtsx_pci_add_sg_tbl(pcr, addr, len, i == count - 1);
405         }
406 
407         spin_lock_irqsave(&pcr->lock, flags);
408 
409         pcr->done = &trans_done;
410         pcr->trans_result = TRANS_NOT_READY;
411         init_completion(&trans_done);
412         rtsx_pci_writel(pcr, RTSX_HDBAR, pcr->host_sg_tbl_addr);
413         rtsx_pci_writel(pcr, RTSX_HDBCTLR, val);
414 
415         spin_unlock_irqrestore(&pcr->lock, flags);
416 
417         timeleft = wait_for_completion_interruptible_timeout(
418                         &trans_done, msecs_to_jiffies(timeout));
419         if (timeleft <= 0) {
420                 dev_dbg(&(pcr->pci->dev), "Timeout (%s %d)\n",
421                                 __func__, __LINE__);
422                 err = -ETIMEDOUT;
423                 goto out;
424         }
425 
426         spin_lock_irqsave(&pcr->lock, flags);
427         if (pcr->trans_result == TRANS_RESULT_FAIL)
428                 err = -EINVAL;
429         else if (pcr->trans_result == TRANS_NO_DEVICE)
430                 err = -ENODEV;
431         spin_unlock_irqrestore(&pcr->lock, flags);
432 
433 out:
434         spin_lock_irqsave(&pcr->lock, flags);
435         pcr->done = NULL;
436         spin_unlock_irqrestore(&pcr->lock, flags);
437 
438         if ((err < 0) && (err != -ENODEV))
439                 rtsx_pci_stop_cmd(pcr);
440 
441         if (pcr->finish_me)
442                 complete(pcr->finish_me);
443 
444         return err;
445 }
446 EXPORT_SYMBOL_GPL(rtsx_pci_dma_transfer);
447 
448 int rtsx_pci_read_ppbuf(struct rtsx_pcr *pcr, u8 *buf, int buf_len)
449 {
450         int err;
451         int i, j;
452         u16 reg;
453         u8 *ptr;
454 
455         if (buf_len > 512)
456                 buf_len = 512;
457 
458         ptr = buf;
459         reg = PPBUF_BASE2;
460         for (i = 0; i < buf_len / 256; i++) {
461                 rtsx_pci_init_cmd(pcr);
462 
463                 for (j = 0; j < 256; j++)
464                         rtsx_pci_add_cmd(pcr, READ_REG_CMD, reg++, 0, 0);
465 
466                 err = rtsx_pci_send_cmd(pcr, 250);
467                 if (err < 0)
468                         return err;
469 
470                 memcpy(ptr, rtsx_pci_get_cmd_data(pcr), 256);
471                 ptr += 256;
472         }
473 
474         if (buf_len % 256) {
475                 rtsx_pci_init_cmd(pcr);
476 
477                 for (j = 0; j < buf_len % 256; j++)
478                         rtsx_pci_add_cmd(pcr, READ_REG_CMD, reg++, 0, 0);
479 
480                 err = rtsx_pci_send_cmd(pcr, 250);
481                 if (err < 0)
482                         return err;
483         }
484 
485         memcpy(ptr, rtsx_pci_get_cmd_data(pcr), buf_len % 256);
486 
487         return 0;
488 }
489 EXPORT_SYMBOL_GPL(rtsx_pci_read_ppbuf);
490 
491 int rtsx_pci_write_ppbuf(struct rtsx_pcr *pcr, u8 *buf, int buf_len)
492 {
493         int err;
494         int i, j;
495         u16 reg;
496         u8 *ptr;
497 
498         if (buf_len > 512)
499                 buf_len = 512;
500 
501         ptr = buf;
502         reg = PPBUF_BASE2;
503         for (i = 0; i < buf_len / 256; i++) {
504                 rtsx_pci_init_cmd(pcr);
505 
506                 for (j = 0; j < 256; j++) {
507                         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD,
508                                         reg++, 0xFF, *ptr);
509                         ptr++;
510                 }
511 
512                 err = rtsx_pci_send_cmd(pcr, 250);
513                 if (err < 0)
514                         return err;
515         }
516 
517         if (buf_len % 256) {
518                 rtsx_pci_init_cmd(pcr);
519 
520                 for (j = 0; j < buf_len % 256; j++) {
521                         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD,
522                                         reg++, 0xFF, *ptr);
523                         ptr++;
524                 }
525 
526                 err = rtsx_pci_send_cmd(pcr, 250);
527                 if (err < 0)
528                         return err;
529         }
530 
531         return 0;
532 }
533 EXPORT_SYMBOL_GPL(rtsx_pci_write_ppbuf);
534 
535 static int rtsx_pci_set_pull_ctl(struct rtsx_pcr *pcr, const u32 *tbl)
536 {
537         int err;
538 
539         rtsx_pci_init_cmd(pcr);
540 
541         while (*tbl & 0xFFFF0000) {
542                 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD,
543                                 (u16)(*tbl >> 16), 0xFF, (u8)(*tbl));
544                 tbl++;
545         }
546 
547         err = rtsx_pci_send_cmd(pcr, 100);
548         if (err < 0)
549                 return err;
550 
551         return 0;
552 }
553 
554 int rtsx_pci_card_pull_ctl_enable(struct rtsx_pcr *pcr, int card)
555 {
556         const u32 *tbl;
557 
558         if (card == RTSX_SD_CARD)
559                 tbl = pcr->sd_pull_ctl_enable_tbl;
560         else if (card == RTSX_MS_CARD)
561                 tbl = pcr->ms_pull_ctl_enable_tbl;
562         else
563                 return -EINVAL;
564 
565         return rtsx_pci_set_pull_ctl(pcr, tbl);
566 }
567 EXPORT_SYMBOL_GPL(rtsx_pci_card_pull_ctl_enable);
568 
569 int rtsx_pci_card_pull_ctl_disable(struct rtsx_pcr *pcr, int card)
570 {
571         const u32 *tbl;
572 
573         if (card == RTSX_SD_CARD)
574                 tbl = pcr->sd_pull_ctl_disable_tbl;
575         else if (card == RTSX_MS_CARD)
576                 tbl = pcr->ms_pull_ctl_disable_tbl;
577         else
578                 return -EINVAL;
579 
580 
581         return rtsx_pci_set_pull_ctl(pcr, tbl);
582 }
583 EXPORT_SYMBOL_GPL(rtsx_pci_card_pull_ctl_disable);
584 
585 static void rtsx_pci_enable_bus_int(struct rtsx_pcr *pcr)
586 {
587         pcr->bier = TRANS_OK_INT_EN | TRANS_FAIL_INT_EN | SD_INT_EN;
588 
589         if (pcr->num_slots > 1)
590                 pcr->bier |= MS_INT_EN;
591 
592         /* Enable Bus Interrupt */
593         rtsx_pci_writel(pcr, RTSX_BIER, pcr->bier);
594 
595         dev_dbg(&(pcr->pci->dev), "RTSX_BIER: 0x%08x\n", pcr->bier);
596 }
597 
598 static inline u8 double_ssc_depth(u8 depth)
599 {
600         return ((depth > 1) ? (depth - 1) : depth);
601 }
602 
603 static u8 revise_ssc_depth(u8 ssc_depth, u8 div)
604 {
605         if (div > CLK_DIV_1) {
606                 if (ssc_depth > (div - 1))
607                         ssc_depth -= (div - 1);
608                 else
609                         ssc_depth = SSC_DEPTH_4M;
610         }
611 
612         return ssc_depth;
613 }
614 
615 int rtsx_pci_switch_clock(struct rtsx_pcr *pcr, unsigned int card_clock,
616                 u8 ssc_depth, bool initial_mode, bool double_clk, bool vpclk)
617 {
618         int err, clk;
619         u8 n, clk_divider, mcu_cnt, div;
620         u8 depth[] = {
621                 [RTSX_SSC_DEPTH_4M] = SSC_DEPTH_4M,
622                 [RTSX_SSC_DEPTH_2M] = SSC_DEPTH_2M,
623                 [RTSX_SSC_DEPTH_1M] = SSC_DEPTH_1M,
624                 [RTSX_SSC_DEPTH_500K] = SSC_DEPTH_500K,
625                 [RTSX_SSC_DEPTH_250K] = SSC_DEPTH_250K,
626         };
627 
628         if (initial_mode) {
629                 /* We use 250k(around) here, in initial stage */
630                 clk_divider = SD_CLK_DIVIDE_128;
631                 card_clock = 30000000;
632         } else {
633                 clk_divider = SD_CLK_DIVIDE_0;
634         }
635         err = rtsx_pci_write_register(pcr, SD_CFG1,
636                         SD_CLK_DIVIDE_MASK, clk_divider);
637         if (err < 0)
638                 return err;
639 
640         card_clock /= 1000000;
641         dev_dbg(&(pcr->pci->dev), "Switch card clock to %dMHz\n", card_clock);
642 
643         clk = card_clock;
644         if (!initial_mode && double_clk)
645                 clk = card_clock * 2;
646         dev_dbg(&(pcr->pci->dev),
647                         "Internal SSC clock: %dMHz (cur_clock = %d)\n",
648                         clk, pcr->cur_clock);
649 
650         if (clk == pcr->cur_clock)
651                 return 0;
652 
653         if (pcr->ops->conv_clk_and_div_n)
654                 n = (u8)pcr->ops->conv_clk_and_div_n(clk, CLK_TO_DIV_N);
655         else
656                 n = (u8)(clk - 2);
657         if ((clk <= 2) || (n > MAX_DIV_N_PCR))
658                 return -EINVAL;
659 
660         mcu_cnt = (u8)(125/clk + 3);
661         if (mcu_cnt > 15)
662                 mcu_cnt = 15;
663 
664         /* Make sure that the SSC clock div_n is not less than MIN_DIV_N_PCR */
665         div = CLK_DIV_1;
666         while ((n < MIN_DIV_N_PCR) && (div < CLK_DIV_8)) {
667                 if (pcr->ops->conv_clk_and_div_n) {
668                         int dbl_clk = pcr->ops->conv_clk_and_div_n(n,
669                                         DIV_N_TO_CLK) * 2;
670                         n = (u8)pcr->ops->conv_clk_and_div_n(dbl_clk,
671                                         CLK_TO_DIV_N);
672                 } else {
673                         n = (n + 2) * 2 - 2;
674                 }
675                 div++;
676         }
677         dev_dbg(&(pcr->pci->dev), "n = %d, div = %d\n", n, div);
678 
679         ssc_depth = depth[ssc_depth];
680         if (double_clk)
681                 ssc_depth = double_ssc_depth(ssc_depth);
682 
683         ssc_depth = revise_ssc_depth(ssc_depth, div);
684         dev_dbg(&(pcr->pci->dev), "ssc_depth = %d\n", ssc_depth);
685 
686         rtsx_pci_init_cmd(pcr);
687         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CLK_CTL,
688                         CLK_LOW_FREQ, CLK_LOW_FREQ);
689         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CLK_DIV,
690                         0xFF, (div << 4) | mcu_cnt);
691         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SSC_CTL1, SSC_RSTB, 0);
692         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SSC_CTL2,
693                         SSC_DEPTH_MASK, ssc_depth);
694         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SSC_DIV_N_0, 0xFF, n);
695         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SSC_CTL1, SSC_RSTB, SSC_RSTB);
696         if (vpclk) {
697                 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_VPCLK0_CTL,
698                                 PHASE_NOT_RESET, 0);
699                 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_VPCLK0_CTL,
700                                 PHASE_NOT_RESET, PHASE_NOT_RESET);
701         }
702 
703         err = rtsx_pci_send_cmd(pcr, 2000);
704         if (err < 0)
705                 return err;
706 
707         /* Wait SSC clock stable */
708         udelay(10);
709         err = rtsx_pci_write_register(pcr, CLK_CTL, CLK_LOW_FREQ, 0);
710         if (err < 0)
711                 return err;
712 
713         pcr->cur_clock = clk;
714         return 0;
715 }
716 EXPORT_SYMBOL_GPL(rtsx_pci_switch_clock);
717 
718 int rtsx_pci_card_power_on(struct rtsx_pcr *pcr, int card)
719 {
720         if (pcr->ops->card_power_on)
721                 return pcr->ops->card_power_on(pcr, card);
722 
723         return 0;
724 }
725 EXPORT_SYMBOL_GPL(rtsx_pci_card_power_on);
726 
727 int rtsx_pci_card_power_off(struct rtsx_pcr *pcr, int card)
728 {
729         if (pcr->ops->card_power_off)
730                 return pcr->ops->card_power_off(pcr, card);
731 
732         return 0;
733 }
734 EXPORT_SYMBOL_GPL(rtsx_pci_card_power_off);
735 
736 int rtsx_pci_card_exclusive_check(struct rtsx_pcr *pcr, int card)
737 {
738         unsigned int cd_mask[] = {
739                 [RTSX_SD_CARD] = SD_EXIST,
740                 [RTSX_MS_CARD] = MS_EXIST
741         };
742 
743         if (!(pcr->flags & PCR_MS_PMOS)) {
744                 /* When using single PMOS, accessing card is not permitted
745                  * if the existing card is not the designated one.
746                  */
747                 if (pcr->card_exist & (~cd_mask[card]))
748                         return -EIO;
749         }
750 
751         return 0;
752 }
753 EXPORT_SYMBOL_GPL(rtsx_pci_card_exclusive_check);
754 
755 int rtsx_pci_switch_output_voltage(struct rtsx_pcr *pcr, u8 voltage)
756 {
757         if (pcr->ops->switch_output_voltage)
758                 return pcr->ops->switch_output_voltage(pcr, voltage);
759 
760         return 0;
761 }
762 EXPORT_SYMBOL_GPL(rtsx_pci_switch_output_voltage);
763 
764 unsigned int rtsx_pci_card_exist(struct rtsx_pcr *pcr)
765 {
766         unsigned int val;
767 
768         val = rtsx_pci_readl(pcr, RTSX_BIPR);
769         if (pcr->ops->cd_deglitch)
770                 val = pcr->ops->cd_deglitch(pcr);
771 
772         return val;
773 }
774 EXPORT_SYMBOL_GPL(rtsx_pci_card_exist);
775 
776 void rtsx_pci_complete_unfinished_transfer(struct rtsx_pcr *pcr)
777 {
778         struct completion finish;
779 
780         pcr->finish_me = &finish;
781         init_completion(&finish);
782 
783         if (pcr->done)
784                 complete(pcr->done);
785 
786         if (!pcr->remove_pci)
787                 rtsx_pci_stop_cmd(pcr);
788 
789         wait_for_completion_interruptible_timeout(&finish,
790                         msecs_to_jiffies(2));
791         pcr->finish_me = NULL;
792 }
793 EXPORT_SYMBOL_GPL(rtsx_pci_complete_unfinished_transfer);
794 
795 static void rtsx_pci_card_detect(struct work_struct *work)
796 {
797         struct delayed_work *dwork;
798         struct rtsx_pcr *pcr;
799         unsigned long flags;
800         unsigned int card_detect = 0, card_inserted, card_removed;
801         u32 irq_status;
802 
803         dwork = to_delayed_work(work);
804         pcr = container_of(dwork, struct rtsx_pcr, carddet_work);
805 
806         dev_dbg(&(pcr->pci->dev), "--> %s\n", __func__);
807 
808         mutex_lock(&pcr->pcr_mutex);
809         spin_lock_irqsave(&pcr->lock, flags);
810 
811         irq_status = rtsx_pci_readl(pcr, RTSX_BIPR);
812         dev_dbg(&(pcr->pci->dev), "irq_status: 0x%08x\n", irq_status);
813 
814         irq_status &= CARD_EXIST;
815         card_inserted = pcr->card_inserted & irq_status;
816         card_removed = pcr->card_removed;
817         pcr->card_inserted = 0;
818         pcr->card_removed = 0;
819 
820         spin_unlock_irqrestore(&pcr->lock, flags);
821 
822         if (card_inserted || card_removed) {
823                 dev_dbg(&(pcr->pci->dev),
824                                 "card_inserted: 0x%x, card_removed: 0x%x\n",
825                                 card_inserted, card_removed);
826 
827                 if (pcr->ops->cd_deglitch)
828                         card_inserted = pcr->ops->cd_deglitch(pcr);
829 
830                 card_detect = card_inserted | card_removed;
831 
832                 pcr->card_exist |= card_inserted;
833                 pcr->card_exist &= ~card_removed;
834         }
835 
836         mutex_unlock(&pcr->pcr_mutex);
837 
838         if ((card_detect & SD_EXIST) && pcr->slots[RTSX_SD_CARD].card_event)
839                 pcr->slots[RTSX_SD_CARD].card_event(
840                                 pcr->slots[RTSX_SD_CARD].p_dev);
841         if ((card_detect & MS_EXIST) && pcr->slots[RTSX_MS_CARD].card_event)
842                 pcr->slots[RTSX_MS_CARD].card_event(
843                                 pcr->slots[RTSX_MS_CARD].p_dev);
844 }
845 
846 static irqreturn_t rtsx_pci_isr(int irq, void *dev_id)
847 {
848         struct rtsx_pcr *pcr = dev_id;
849         u32 int_reg;
850 
851         if (!pcr)
852                 return IRQ_NONE;
853 
854         spin_lock(&pcr->lock);
855 
856         int_reg = rtsx_pci_readl(pcr, RTSX_BIPR);
857         /* Clear interrupt flag */
858         rtsx_pci_writel(pcr, RTSX_BIPR, int_reg);
859         if ((int_reg & pcr->bier) == 0) {
860                 spin_unlock(&pcr->lock);
861                 return IRQ_NONE;
862         }
863         if (int_reg == 0xFFFFFFFF) {
864                 spin_unlock(&pcr->lock);
865                 return IRQ_HANDLED;
866         }
867 
868         int_reg &= (pcr->bier | 0x7FFFFF);
869 
870         if (int_reg & SD_INT) {
871                 if (int_reg & SD_EXIST) {
872                         pcr->card_inserted |= SD_EXIST;
873                 } else {
874                         pcr->card_removed |= SD_EXIST;
875                         pcr->card_inserted &= ~SD_EXIST;
876                 }
877         }
878 
879         if (int_reg & MS_INT) {
880                 if (int_reg & MS_EXIST) {
881                         pcr->card_inserted |= MS_EXIST;
882                 } else {
883                         pcr->card_removed |= MS_EXIST;
884                         pcr->card_inserted &= ~MS_EXIST;
885                 }
886         }
887 
888         if (int_reg & (NEED_COMPLETE_INT | DELINK_INT)) {
889                 if (int_reg & (TRANS_FAIL_INT | DELINK_INT)) {
890                         pcr->trans_result = TRANS_RESULT_FAIL;
891                         if (pcr->done)
892                                 complete(pcr->done);
893                 } else if (int_reg & TRANS_OK_INT) {
894                         pcr->trans_result = TRANS_RESULT_OK;
895                         if (pcr->done)
896                                 complete(pcr->done);
897                 }
898         }
899 
900         if (pcr->card_inserted || pcr->card_removed)
901                 schedule_delayed_work(&pcr->carddet_work,
902                                 msecs_to_jiffies(200));
903 
904         spin_unlock(&pcr->lock);
905         return IRQ_HANDLED;
906 }
907 
908 static int rtsx_pci_acquire_irq(struct rtsx_pcr *pcr)
909 {
910         dev_info(&(pcr->pci->dev), "%s: pcr->msi_en = %d, pci->irq = %d\n",
911                         __func__, pcr->msi_en, pcr->pci->irq);
912 
913         if (request_irq(pcr->pci->irq, rtsx_pci_isr,
914                         pcr->msi_en ? 0 : IRQF_SHARED,
915                         DRV_NAME_RTSX_PCI, pcr)) {
916                 dev_err(&(pcr->pci->dev),
917                         "rtsx_sdmmc: unable to grab IRQ %d, disabling device\n",
918                         pcr->pci->irq);
919                 return -1;
920         }
921 
922         pcr->irq = pcr->pci->irq;
923         pci_intx(pcr->pci, !pcr->msi_en);
924 
925         return 0;
926 }
927 
928 static void rtsx_pci_idle_work(struct work_struct *work)
929 {
930         struct delayed_work *dwork = to_delayed_work(work);
931         struct rtsx_pcr *pcr = container_of(dwork, struct rtsx_pcr, idle_work);
932 
933         dev_dbg(&(pcr->pci->dev), "--> %s\n", __func__);
934 
935         mutex_lock(&pcr->pcr_mutex);
936 
937         pcr->state = PDEV_STAT_IDLE;
938 
939         if (pcr->ops->disable_auto_blink)
940                 pcr->ops->disable_auto_blink(pcr);
941         if (pcr->ops->turn_off_led)
942                 pcr->ops->turn_off_led(pcr);
943 
944         if (pcr->aspm_en)
945                 rtsx_pci_write_config_byte(pcr, LCTLR, pcr->aspm_en);
946 
947         mutex_unlock(&pcr->pcr_mutex);
948 }
949 
950 #ifdef CONFIG_PM
951 static void rtsx_pci_power_off(struct rtsx_pcr *pcr, u8 pm_state)
952 {
953         if (pcr->ops->turn_off_led)
954                 pcr->ops->turn_off_led(pcr);
955 
956         rtsx_pci_writel(pcr, RTSX_BIER, 0);
957         pcr->bier = 0;
958 
959         rtsx_pci_write_register(pcr, PETXCFG, 0x08, 0x08);
960         rtsx_pci_write_register(pcr, HOST_SLEEP_STATE, 0x03, pm_state);
961 
962         if (pcr->ops->force_power_down)
963                 pcr->ops->force_power_down(pcr, pm_state);
964 }
965 #endif
966 
967 static int rtsx_pci_init_hw(struct rtsx_pcr *pcr)
968 {
969         int err;
970 
971         rtsx_pci_writel(pcr, RTSX_HCBAR, pcr->host_cmds_addr);
972 
973         rtsx_pci_enable_bus_int(pcr);
974 
975         /* Power on SSC */
976         err = rtsx_pci_write_register(pcr, FPDCTL, SSC_POWER_DOWN, 0);
977         if (err < 0)
978                 return err;
979 
980         /* Wait SSC power stable */
981         udelay(200);
982 
983         if (pcr->ops->optimize_phy) {
984                 err = pcr->ops->optimize_phy(pcr);
985                 if (err < 0)
986                         return err;
987         }
988 
989         rtsx_pci_init_cmd(pcr);
990 
991         /* Set mcu_cnt to 7 to ensure data can be sampled properly */
992         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CLK_DIV, 0x07, 0x07);
993 
994         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, HOST_SLEEP_STATE, 0x03, 0x00);
995         /* Disable card clock */
996         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_CLK_EN, 0x1E, 0);
997         /* Reset delink mode */
998         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CHANGE_LINK_STATE, 0x0A, 0);
999         /* Card driving select */
1000         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_DRIVE_SEL,
1001                         0xFF, pcr->card_drive_sel);
1002         /* Enable SSC Clock */
1003         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SSC_CTL1,
1004                         0xFF, SSC_8X_EN | SSC_SEL_4M);
1005         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SSC_CTL2, 0xFF, 0x12);
1006         /* Disable cd_pwr_save */
1007         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CHANGE_LINK_STATE, 0x16, 0x10);
1008         /* Clear Link Ready Interrupt */
1009         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, IRQSTAT0,
1010                         LINK_RDY_INT, LINK_RDY_INT);
1011         /* Enlarge the estimation window of PERST# glitch
1012          * to reduce the chance of invalid card interrupt
1013          */
1014         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PERST_GLITCH_WIDTH, 0xFF, 0x80);
1015         /* Update RC oscillator to 400k
1016          * bit[0] F_HIGH: for RC oscillator, Rst_value is 1'b1
1017          *                1: 2M  0: 400k
1018          */
1019         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, RCCTL, 0x01, 0x00);
1020         /* Set interrupt write clear
1021          * bit 1: U_elbi_if_rd_clr_en
1022          *      1: Enable ELBI interrupt[31:22] & [7:0] flag read clear
1023          *      0: ELBI interrupt flag[31:22] & [7:0] only can be write clear
1024          */
1025         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, NFTS_TX_CTRL, 0x02, 0);
1026 
1027         err = rtsx_pci_send_cmd(pcr, 100);
1028         if (err < 0)
1029                 return err;
1030 
1031         rtsx_pci_write_config_byte(pcr, LCTLR, 0);
1032 
1033         /* Enable clk_request_n to enable clock power management */
1034         rtsx_pci_write_config_byte(pcr, 0x81, 1);
1035         /* Enter L1 when host tx idle */
1036         rtsx_pci_write_config_byte(pcr, 0x70F, 0x5B);
1037 
1038         if (pcr->ops->extra_init_hw) {
1039                 err = pcr->ops->extra_init_hw(pcr);
1040                 if (err < 0)
1041                         return err;
1042         }
1043 
1044         /* No CD interrupt if probing driver with card inserted.
1045          * So we need to initialize pcr->card_exist here.
1046          */
1047         if (pcr->ops->cd_deglitch)
1048                 pcr->card_exist = pcr->ops->cd_deglitch(pcr);
1049         else
1050                 pcr->card_exist = rtsx_pci_readl(pcr, RTSX_BIPR) & CARD_EXIST;
1051 
1052         return 0;
1053 }
1054 
1055 static int rtsx_pci_init_chip(struct rtsx_pcr *pcr)
1056 {
1057         int err;
1058 
1059         spin_lock_init(&pcr->lock);
1060         mutex_init(&pcr->pcr_mutex);
1061 
1062         switch (PCI_PID(pcr)) {
1063         default:
1064         case 0x5209:
1065                 rts5209_init_params(pcr);
1066                 break;
1067 
1068         case 0x5229:
1069                 rts5229_init_params(pcr);
1070                 break;
1071 
1072         case 0x5289:
1073                 rtl8411_init_params(pcr);
1074                 break;
1075 
1076         case 0x5227:
1077                 rts5227_init_params(pcr);
1078                 break;
1079 
1080         case 0x5249:
1081                 rts5249_init_params(pcr);
1082                 break;
1083 
1084         case 0x5287:
1085                 rtl8411b_init_params(pcr);
1086                 break;
1087 
1088         case 0x5286:
1089                 rtl8402_init_params(pcr);
1090                 break;
1091         }
1092 
1093         dev_dbg(&(pcr->pci->dev), "PID: 0x%04x, IC version: 0x%02x\n",
1094                         PCI_PID(pcr), pcr->ic_version);
1095 
1096         pcr->slots = kcalloc(pcr->num_slots, sizeof(struct rtsx_slot),
1097                         GFP_KERNEL);
1098         if (!pcr->slots)
1099                 return -ENOMEM;
1100 
1101         if (pcr->ops->fetch_vendor_settings)
1102                 pcr->ops->fetch_vendor_settings(pcr);
1103 
1104         dev_dbg(&(pcr->pci->dev), "pcr->aspm_en = 0x%x\n", pcr->aspm_en);
1105         dev_dbg(&(pcr->pci->dev), "pcr->sd30_drive_sel_1v8 = 0x%x\n",
1106                         pcr->sd30_drive_sel_1v8);
1107         dev_dbg(&(pcr->pci->dev), "pcr->sd30_drive_sel_3v3 = 0x%x\n",
1108                         pcr->sd30_drive_sel_3v3);
1109         dev_dbg(&(pcr->pci->dev), "pcr->card_drive_sel = 0x%x\n",
1110                         pcr->card_drive_sel);
1111         dev_dbg(&(pcr->pci->dev), "pcr->flags = 0x%x\n", pcr->flags);
1112 
1113         pcr->state = PDEV_STAT_IDLE;
1114         err = rtsx_pci_init_hw(pcr);
1115         if (err < 0) {
1116                 kfree(pcr->slots);
1117                 return err;
1118         }
1119 
1120         return 0;
1121 }
1122 
1123 static int rtsx_pci_probe(struct pci_dev *pcidev,
1124                           const struct pci_device_id *id)
1125 {
1126         struct rtsx_pcr *pcr;
1127         struct pcr_handle *handle;
1128         u32 base, len;
1129         int ret, i;
1130 
1131         dev_dbg(&(pcidev->dev),
1132                 ": Realtek PCI-E Card Reader found at %s [%04x:%04x] (rev %x)\n",
1133                 pci_name(pcidev), (int)pcidev->vendor, (int)pcidev->device,
1134                 (int)pcidev->revision);
1135 
1136         ret = pci_set_dma_mask(pcidev, DMA_BIT_MASK(32));
1137         if (ret < 0)
1138                 return ret;
1139 
1140         ret = pci_enable_device(pcidev);
1141         if (ret)
1142                 return ret;
1143 
1144         ret = pci_request_regions(pcidev, DRV_NAME_RTSX_PCI);
1145         if (ret)
1146                 goto disable;
1147 
1148         pcr = kzalloc(sizeof(*pcr), GFP_KERNEL);
1149         if (!pcr) {
1150                 ret = -ENOMEM;
1151                 goto release_pci;
1152         }
1153 
1154         handle = kzalloc(sizeof(*handle), GFP_KERNEL);
1155         if (!handle) {
1156                 ret = -ENOMEM;
1157                 goto free_pcr;
1158         }
1159         handle->pcr = pcr;
1160 
1161         idr_preload(GFP_KERNEL);
1162         spin_lock(&rtsx_pci_lock);
1163         ret = idr_alloc(&rtsx_pci_idr, pcr, 0, 0, GFP_NOWAIT);
1164         if (ret >= 0)
1165                 pcr->id = ret;
1166         spin_unlock(&rtsx_pci_lock);
1167         idr_preload_end();
1168         if (ret < 0)
1169                 goto free_handle;
1170 
1171         pcr->pci = pcidev;
1172         dev_set_drvdata(&pcidev->dev, handle);
1173 
1174         len = pci_resource_len(pcidev, 0);
1175         base = pci_resource_start(pcidev, 0);
1176         pcr->remap_addr = ioremap_nocache(base, len);
1177         if (!pcr->remap_addr) {
1178                 ret = -ENOMEM;
1179                 goto free_handle;
1180         }
1181 
1182         pcr->rtsx_resv_buf = dma_alloc_coherent(&(pcidev->dev),
1183                         RTSX_RESV_BUF_LEN, &(pcr->rtsx_resv_buf_addr),
1184                         GFP_KERNEL);
1185         if (pcr->rtsx_resv_buf == NULL) {
1186                 ret = -ENXIO;
1187                 goto unmap;
1188         }
1189         pcr->host_cmds_ptr = pcr->rtsx_resv_buf;
1190         pcr->host_cmds_addr = pcr->rtsx_resv_buf_addr;
1191         pcr->host_sg_tbl_ptr = pcr->rtsx_resv_buf + HOST_CMDS_BUF_LEN;
1192         pcr->host_sg_tbl_addr = pcr->rtsx_resv_buf_addr + HOST_CMDS_BUF_LEN;
1193 
1194         pcr->card_inserted = 0;
1195         pcr->card_removed = 0;
1196         INIT_DELAYED_WORK(&pcr->carddet_work, rtsx_pci_card_detect);
1197         INIT_DELAYED_WORK(&pcr->idle_work, rtsx_pci_idle_work);
1198 
1199         pcr->msi_en = msi_en;
1200         if (pcr->msi_en) {
1201                 ret = pci_enable_msi(pcidev);
1202                 if (ret)
1203                         pcr->msi_en = false;
1204         }
1205 
1206         ret = rtsx_pci_acquire_irq(pcr);
1207         if (ret < 0)
1208                 goto disable_msi;
1209 
1210         pci_set_master(pcidev);
1211         synchronize_irq(pcr->irq);
1212 
1213         ret = rtsx_pci_init_chip(pcr);
1214         if (ret < 0)
1215                 goto disable_irq;
1216 
1217         for (i = 0; i < ARRAY_SIZE(rtsx_pcr_cells); i++) {
1218                 rtsx_pcr_cells[i].platform_data = handle;
1219                 rtsx_pcr_cells[i].pdata_size = sizeof(*handle);
1220         }
1221         ret = mfd_add_devices(&pcidev->dev, pcr->id, rtsx_pcr_cells,
1222                         ARRAY_SIZE(rtsx_pcr_cells), NULL, 0, NULL);
1223         if (ret < 0)
1224                 goto disable_irq;
1225 
1226         schedule_delayed_work(&pcr->idle_work, msecs_to_jiffies(200));
1227 
1228         return 0;
1229 
1230 disable_irq:
1231         free_irq(pcr->irq, (void *)pcr);
1232 disable_msi:
1233         if (pcr->msi_en)
1234                 pci_disable_msi(pcr->pci);
1235         dma_free_coherent(&(pcr->pci->dev), RTSX_RESV_BUF_LEN,
1236                         pcr->rtsx_resv_buf, pcr->rtsx_resv_buf_addr);
1237 unmap:
1238         iounmap(pcr->remap_addr);
1239 free_handle:
1240         kfree(handle);
1241 free_pcr:
1242         kfree(pcr);
1243 release_pci:
1244         pci_release_regions(pcidev);
1245 disable:
1246         pci_disable_device(pcidev);
1247 
1248         return ret;
1249 }
1250 
1251 static void rtsx_pci_remove(struct pci_dev *pcidev)
1252 {
1253         struct pcr_handle *handle = pci_get_drvdata(pcidev);
1254         struct rtsx_pcr *pcr = handle->pcr;
1255 
1256         pcr->remove_pci = true;
1257 
1258         /* Disable interrupts at the pcr level */
1259         spin_lock_irq(&pcr->lock);
1260         rtsx_pci_writel(pcr, RTSX_BIER, 0);
1261         pcr->bier = 0;
1262         spin_unlock_irq(&pcr->lock);
1263 
1264         cancel_delayed_work_sync(&pcr->carddet_work);
1265         cancel_delayed_work_sync(&pcr->idle_work);
1266 
1267         mfd_remove_devices(&pcidev->dev);
1268 
1269         dma_free_coherent(&(pcr->pci->dev), RTSX_RESV_BUF_LEN,
1270                         pcr->rtsx_resv_buf, pcr->rtsx_resv_buf_addr);
1271         free_irq(pcr->irq, (void *)pcr);
1272         if (pcr->msi_en)
1273                 pci_disable_msi(pcr->pci);
1274         iounmap(pcr->remap_addr);
1275 
1276         pci_release_regions(pcidev);
1277         pci_disable_device(pcidev);
1278 
1279         spin_lock(&rtsx_pci_lock);
1280         idr_remove(&rtsx_pci_idr, pcr->id);
1281         spin_unlock(&rtsx_pci_lock);
1282 
1283         kfree(pcr->slots);
1284         kfree(pcr);
1285         kfree(handle);
1286 
1287         dev_dbg(&(pcidev->dev),
1288                 ": Realtek PCI-E Card Reader at %s [%04x:%04x] has been removed\n",
1289                 pci_name(pcidev), (int)pcidev->vendor, (int)pcidev->device);
1290 }
1291 
1292 #ifdef CONFIG_PM
1293 
1294 static int rtsx_pci_suspend(struct pci_dev *pcidev, pm_message_t state)
1295 {
1296         struct pcr_handle *handle;
1297         struct rtsx_pcr *pcr;
1298 
1299         dev_dbg(&(pcidev->dev), "--> %s\n", __func__);
1300 
1301         handle = pci_get_drvdata(pcidev);
1302         pcr = handle->pcr;
1303 
1304         cancel_delayed_work(&pcr->carddet_work);
1305         cancel_delayed_work(&pcr->idle_work);
1306 
1307         mutex_lock(&pcr->pcr_mutex);
1308 
1309         rtsx_pci_power_off(pcr, HOST_ENTER_S3);
1310 
1311         pci_save_state(pcidev);
1312         pci_enable_wake(pcidev, pci_choose_state(pcidev, state), 0);
1313         pci_disable_device(pcidev);
1314         pci_set_power_state(pcidev, pci_choose_state(pcidev, state));
1315 
1316         mutex_unlock(&pcr->pcr_mutex);
1317         return 0;
1318 }
1319 
1320 static int rtsx_pci_resume(struct pci_dev *pcidev)
1321 {
1322         struct pcr_handle *handle;
1323         struct rtsx_pcr *pcr;
1324         int ret = 0;
1325 
1326         dev_dbg(&(pcidev->dev), "--> %s\n", __func__);
1327 
1328         handle = pci_get_drvdata(pcidev);
1329         pcr = handle->pcr;
1330 
1331         mutex_lock(&pcr->pcr_mutex);
1332 
1333         pci_set_power_state(pcidev, PCI_D0);
1334         pci_restore_state(pcidev);
1335         ret = pci_enable_device(pcidev);
1336         if (ret)
1337                 goto out;
1338         pci_set_master(pcidev);
1339 
1340         ret = rtsx_pci_write_register(pcr, HOST_SLEEP_STATE, 0x03, 0x00);
1341         if (ret)
1342                 goto out;
1343 
1344         ret = rtsx_pci_init_hw(pcr);
1345         if (ret)
1346                 goto out;
1347 
1348         schedule_delayed_work(&pcr->idle_work, msecs_to_jiffies(200));
1349 
1350 out:
1351         mutex_unlock(&pcr->pcr_mutex);
1352         return ret;
1353 }
1354 
1355 static void rtsx_pci_shutdown(struct pci_dev *pcidev)
1356 {
1357         struct pcr_handle *handle;
1358         struct rtsx_pcr *pcr;
1359 
1360         dev_dbg(&(pcidev->dev), "--> %s\n", __func__);
1361 
1362         handle = pci_get_drvdata(pcidev);
1363         pcr = handle->pcr;
1364         rtsx_pci_power_off(pcr, HOST_ENTER_S1);
1365 
1366         pci_disable_device(pcidev);
1367 }
1368 
1369 #else /* CONFIG_PM */
1370 
1371 #define rtsx_pci_suspend NULL
1372 #define rtsx_pci_resume NULL
1373 #define rtsx_pci_shutdown NULL
1374 
1375 #endif /* CONFIG_PM */
1376 
1377 static struct pci_driver rtsx_pci_driver = {
1378         .name = DRV_NAME_RTSX_PCI,
1379         .id_table = rtsx_pci_ids,
1380         .probe = rtsx_pci_probe,
1381         .remove = rtsx_pci_remove,
1382         .suspend = rtsx_pci_suspend,
1383         .resume = rtsx_pci_resume,
1384         .shutdown = rtsx_pci_shutdown,
1385 };
1386 module_pci_driver(rtsx_pci_driver);
1387 
1388 MODULE_LICENSE("GPL");
1389 MODULE_AUTHOR("Wei WANG <wei_wang@realsil.com.cn>");
1390 MODULE_DESCRIPTION("Realtek PCI-E Card Reader Driver");
1391 

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